--- a/hgext/convert/hg.py
+++ b/hgext/convert/hg.py
@@ -31,7 +31,7 @@ class convert_mercurial(converter_sink):
 
     def delfile(self, f):
         try:
-            os.unlink(self.repo.wjoin(f))
+            util.unlink(self.repo.wjoin(f))
             #self.repo.remove([f])
         except:
             pass